Apparatus for measuring and registering the oscillations of vibrating bodies, such as marine vessels, airships, railway-vehicles, and the like.



P. ROSS. APPARATUS FOR MEASURING AND REGISTERING THE OSOILLATIONS 0F VIBRATING BODIES,

SUCH AS MARINE VESSELS, AIRSHIPS, RAILWAY VEHICLES, AND THE LIKE.

APPLICATION FILED APR.27, 1908.

Patentd May 17, 1910.

UNITED" STATES PAarEnrornroE. J

PAUL Ross,- 01! rrAL nnsrAnT, GERMANY.

- (Iii APPARATUS ron MEABUBINGAND nneis'rEnmG rim oscmtA'rioNs am l am norms, soon As MARINE vnssnrls, AIRSHIPB, RAILWAY-vanis es, AND THE LIKE,

I?) all whom it may concern;

Be it known that I, PAU Ross, a subject of the German Emperor, and resident of measuring and registering the oscillations of vibrating bodies such as marine vessels, air ships, railway vehicles and the like, which overcomes the drawbacks occurrin to the hitherto known devices of similar kind by the pendulum indicating the direction of the vertical line being inclosed in aliquid to form a buoyancy pendulum and at its bottom end fixed insuch a manner that it is capable of turning freely on all horizontal axes leading through its point of attachment.

The accompanying drawing represents the improved a paratus.

central section and plan of the same.

The ap aratus .com rises an inner receptacle a w ich is who 'lyfilled with liquid,

and an outer receptacle 6 which is only partly filled with liquid; The empty s ace 0 o in the latter receptacle serves to enab e the expansion of the liquid at an increase of the temperature in which case the surplus of liquid flows through two opposite openin s (1 into the space 0 into whichalso' air bub les are led from the inner receptacle, which might possibly be formed at a sudden cooling of the liquid and which would result in a deviation from the vertical line of the buoyancy endulum g. The latter is inclosed in t e inner receptacle and with its, bottom end movably attached to the closingstopper 6, of the latter by meansof a suitably constructedjoint f. In order to prevent, whentilting the apparatus, the air in the s ace 0 above the liquid column from escaping through the openings d to the upper part of the inner receptacle a, the receptacles a and b are so designed that the.

space 0 inclosed by them is narrowed toward its top so that it resents in each cross section approximate y the same area. 'The outer receptacle b is at its lower trunnion like'end 22 provided with screw-threads and with the" latter fixedfinja as plate h. The e Specification of Letters Patent. Patented May 17, 1910. Application filed April 27, 1908. Serial No. 42 9,423

screw-threads-into wh ch the closing stopper e is screwed, a washer is" insuring tightness of the latter against escape ofliquid. At theupper end the receptaclesare closed by a glass bonnet [which rests n; a tightening ring plaoed"on' the u perflange 'n of the inner receptacle a. On the outer flange of the glass bonnet also a. tightening ring 0 is disposed. The upper flanges n and p of the inner and outer receptacles respectively,

are together with the ti htening rings m and -0, with the flange o the glass bonnet between them, held tightly together by means of an up er ring r and a lower ring 8 fixed together y means of screws t.

The glass bonnet is provided with a gradnation a of which the degree lines are arranged in crossed fashion at equal distances from each other. Saidgradu'ation can be designated as a net of degrees of latitude,

such as is generally employed for measuring the vibrating movements of ships and rail- Figures'l an 2 are respectively a verticalway vehicles. On thecutting point of the two middle degree lines or equators the pendulum 9 assumes the zero-point at the normal equilibrium ofthe" apparatus. Ap aratus which is to serve for readingif on l is provided with-a white buoyancy endulum having a black pole. by which the movement is to be registered, receives in the buoyancy pendulum g-' which in this case is made of blind glass Apparatus A with a glaring po1e--an illuminating source,

for instance-an electric lamp v, which throu h thepole w shines onsensitized paper direct y 'plac'ed on the glass bonnet. The graduation is thereby at the same. time transmitted on the paper.

The improved device allows one to ascertain by a simple glance on the glass bonnet the resulting eviation from the vertical line of the vibrating body, both com onents being combined in one point. urther an overswinging of the buoyancy pendulum is uite im' ossible, while the composition of t e liqui as to itsinner friction may be so chosen as to practically prevent a selfswin 'ng of the pendulum, without impairing t e exactness of the ind cations. The apparatus may be also used in inverted fashion, in which case the weight of the pendulum must of course outwelgh the buoyancy.

Having fully described my invention, what I claim and desire to secure by Letters Patent is 1.1111 an apparatus for measuring and registering. the; oscillatiolnsfof vibrating bodies, in combinationfan inner receptacle wholly filled withliquid and provided with openings, an outer receptacle partly filled with liquid so as to leave an empty space between both receptacles, a closing stopper for said innerreceptacle, a buoyancy pendulum arranged in said inner receptacle, a joint to movably attachsaid pendulum at one end to said stopper, and a lass bonnet arranged on said inner 'receptace and provided with a radu t on a l e pu po e o th- 2." In a paratus for measnringand registering tlEe" oscillations" of vibrating bodies, in'coinbination', an "inner rece' tacle whpuy fin d wi h liquid a d provide with openings, an outerreceptacle partly filled with liquid so as to leave an empty space between both receptacles, a closing stopper for said inner receptacle, a buoyancy endulum arranged in said inner receptac e and consisting of blind lass having a glaring pole, a joint to mov %)ly attach said pendu- PAUL Witnesses A. G- P RK NS, ll'IENRY WAN'nnR. 

